And the new outfield dimensions at Oracle Park will be . . .

A construction crew dismantles a section of bleachers behind center field in early November to make room for the new bullpen at Oracle Park.

Photo: Paul Chinn / The Chronicle

SAN DIEGO — The Giants as soon as Thursday are expected to reveal renderings of changes to Oracle Park that will move the bullpens beyond the outfield fences, create a new gathering spot behind center field and bring the notoriously distant fences a bit closer to the plate.

The Chronicle has learned the new dimensions in the outfield, which surely will interest hitters and pitchers alike.

The deepest point of the field, the corner in Triples Alley where the right- and center-field walls meet, will be shortened from 421 feet to 415 feet, still requiring a prodigious shot to become a home run.

The biggest change will come in straightaway center, which goes from 399 feet to 391. That tends to be a live part of the yard already, so homers there could rise noticeably.

The intersection between the left- and center-field walls will be 399 feet from the plate. It had been 404.

Team officials wanted to preserve the nature of the Oracle Park dimensions, particularly Triples Alley, but need to move the fences to accommodate the new bullpens. They are being moved off the field in for player safety.

Henry Schulman has covered the San Francisco Giants since 1988, starting with the Oakland Tribune and San Francisco Examiner before moving to the San Francisco Chronicle in 1998. His career has spanned the "Earthquake World Series" in 1989 and the Giants' three World Series championships in 2010, 2012 and 2014. In between, he covered Barry Bonds' controversial career with the Giants, including Bonds ' successful quests for home-run records and his place in baseball's performance-enhancing drugs scandal. Known for his perspective and wit, Henry also appears frequently on radio and television talking Giants, and is a popular follow on Twitter.